Cap



Jan. 29 1924.

C. HAMMER CAP Filed Nov. 29 1922 8mm Z Czar/65 flat nine); 351 rs Patented Jan. 29, 1924.

UNITED STATES PATENT 'oFr cs.

CHARLES HAMMER, F HOLLIS COURT BOULEVARD, NEW YORK.

CAP.

Application filed November 29, 1922. Serial No. 603,999,

for glass containers such as jars and'bottles, 111 which lOOkIII projections of wedge form are formed in the skirt or flange of the cap adapted to cooperate with looking projections on the container neck, whereby the closure can be screwed onto the jar to form a tight seal, and also readily removed from' the same.

The object of the present invention is the provisionof a closure of this character with a special form of projection, sopressed inwardly of the skirt or flange as to provide an effective sealing wall or face at the upper part or edge of the projection, extending for a very considerable length of each projection, and thus provide a large area of sealing surface .to engage-the thread or other locking projection on the container.

A further object of the invention is the provision of an improved cap in which the locking projection will have its wide portion of its working face adjacent to the lower part of the closure, or at the initial entering end of the projection as it is screwed down on the jar. v

A still further object of the invention is to provide a closure with a locking projection narrow and deep at the lower entering end thereof and wide and shallow toward the opposite end.

In my prior Patent 1,160,596 dated November 16, 1915, upon which the present cap is an improvemennthe locking projections are narrow and shallow at their entering end adjacent to the beaded edge and wide and deep toward or at their opposite end, whereas in the present improved cap the locking projections of wedge form are narrow but shallow toward or at their opposite end, in consequence of which a more efle'ctive holding, locking or sealing of the cap upon the locking projections or threads of the container neck is obtained because the thread or projection of. the jar neck is more likely, for the reasons hereinafter stated, to be more uniformly formed at those points where the entering ends of the projections finally seat.

Thereforewne of the objects of the present improvement is the provision of a metal cap, which may be made of relatively thin sheet metal having a relatively shallow flange or skirt provided with reinforcing corrugations and a strengthened or reinforcedas a beaded, rolledor curled-lower edge,

. and the flange of whichcap is provided with a projection or projections narrow but deep at its entering end and wide but shallow toward its opposite end, whichshallow portion substantially fills the space between the corrugations and the beaded lower edge. and in which the projections are of wedge form having a helical or'inclined sealing, looking or working upper face or edge, and a relatively straight--in the direction of its length-lower edge which may be substantially parallel or in close proximity to the loweredge or strengthened edge of the cap whereby all the advantages of the form of projections shown in my prior patent are still obtained with the additional advantage of an increased locking efficiency.

In the accompanying drawings showing one embodiment of my invention, Figure 1 shows the closure applied to a jar; Fig. 2, is a plan view partly broken away to show a jar thread and also to show the upper wall of a projection; Fig. 3 is a fragmentary view of the jar and closure; Fig. '41 is a partial view ofthe closure inverted; Fig. 5 is a cross section on the line 5, 5 of Fig. 3; Fig. 6, is a cross section on line 6, 6 of Fig. 3; Fig. 7 is a cross section on line 7, 7 of Fig. 3; and Fig. 8 is a cross section on line 8, 8

of Fig. 3. V Before explaining in detail the present tion, and not of limitation. deep at their entering end and wlde but rality of projections5, of wedge form by forcing inwardly the wall of the skirt 3. Four of these projections are shown adapted to cooperate with divided threads 6 on the jar 1, which are suitably inclined.

Each of these projections 5 is shown "as substantially of wedge form, and is provided practically with three walls, an upper wall 7 facing the top of the cap, an inner or vertical wall 8, of slightly curved formation and a bottom wall 9. This improved projection is deepest where the side wall 8 is narrowest, which is at the entering end 10 of the projection, see -l. The depth of the projectiongradually"decreases as the wall 8 approaches the skirt or flange wall 3 from this deep end 10 toward the other endportion. The upper wall 7 is widest at this deep end and remains wide for a. considerable distance, and then gradually tapers off thus forming a shelf or working face 7, of considerable area adapted to engage the lower wall of the thread 6 on the jar, which will preferably have its lower wal at every abrupt angle relatively to the ne t the ia I .fihc lower wall 9 of the pro-jection'gradually tapers toward the shallow end and practically merges into the skirt wall, so hat t r l tiv stra ght si wa 8' is inclined ou ard y at he la ge n a indicated in the sectional views, Figs. 8

Thus it will be seen that each of the projections or wedges of the closure is deep and narrow at one end, which is the'lower end adjacent the head of the closure, and becomes wider from this end toward the other end, where it becomesmore shallow practically merging into the cylindrical wall 3 of the skirt. The threads or lugs 6 on the jar 1, are preferably inclined at the same angle as the upper wall 7 of each projection. hen the cap is applied the narrow 7 deep end portion 10 passes below the upper end portionof each jar thread 3, with its upper wall '7 engaging the lower wall of with threads sometimes have the upper end portion of the thread broken or chipped while the lower portion adjacent the usual bead or shoulder 11 on the jar is less likely to be damaged as it is protected by this shoulder;v Therefore a better sea-ling is insured because the jar thread is injbetter condition at its lower. portion. Furthermere the main sealing portion of each projection being at-the' lower part of the skirt, of the closure, the latter can yieldr-nore to provide for j s that ar inesular and no a us circle, than if the sealing portion of the projection was at the upper part or near the top of the cap, while at the same time the deep part of. the projection is more effectively strengthened by reason of the fact that it is closer to the strengthened or curled or beaded edge of the cap, so that it is not so likelyto be distorted out of its proper locking position and thus the cap can be very efiectively' used for re-sealing purposes. It will be further observed that these improved locking projections, narrow but deep at their entering ends and wide but shallow toward their opposite ends, are so located in the present instance that the lower edge of each projection is relatively close to and may be substantially parallel with the lower or strengthened or reinforced edge of the cap, while the upper or working or sealing edge of, the projection is inclined upwardly toward the top of the cap, thus forming in this sense a thread'like or helical working edge with the wider portions of the locking projections preferably substantially filling the space between the beaded edge and he orrugat ons of t p s h I am able t pr ide a l w fla ge p ha ing all the me to ou fea re f the cap of the patent referred to as well as certain advantages thereover. As the holding ,e fiflicncy. of each projection is usually greatest where it is the deepest, it follows that by having the deepest part of a pro jection at its shallow .or entering end it will engage under the glass thread or projection when the cap is first started onto the con tainer and continues to engage thereunder throughout the entire length of the glass threadso that the cap is drawn down onto the container during all of its rotary move ment home, and consequently the container is very efiectively se ed.

It is to be understood that by describing in detail herein any particular form, struc' trim, or arrangement, it is not intended to limit the invention beyond the terms of the severalclaims or the requirements of the prior art.

Having thus explained the nature of my said invention and described away of constructing and using the same, although without attempting to set forth all the forms in which it may be made, or all of the modes of its use, I claim:

1. A sheet metal closure for container-sand comprising a top and a. flange, the flange being provided with an inwardly extending projection narrow and deep at one end and wide and shallow toward the other end.

2. A sheet metal closure for containers and con'i'prisinga top and a'flange provided with a beaded lower edge, the flange-being provided-with an inwardly extending projeetion' narrow and deep at one end and wide shallomtoward the other. endv with. the

of the container thread.

fit)

4%. A sheet metal closure for a. threaded top'cont-ainer, and comprising a top and a flange provided with an inwardly extending projection narrow anddeep at one end and wide and shallowtoward the other end the upper wall of the projection facing the top of the cap extending substantially perpendicular to the adjacent cap flangethereby.

to provide a comparatively flat spiral wall for engagement with the under wall of the container thread, and which cap wall is of maximum width at its lower end adjacent the flange edge.

5. A sheet metal closure for containers and comprising a top and a skirt, provided with an inwardly extending projection, which is deep at one end portion adjacent the lower edge of the skirt and shallow toward the opposite end of the projection.

6. A sheet metal closure for containers and comprising a top and a skirt provided with an inwardlly extending projection narrow and deep at one end portion adjacent to the lower edge of the cap and shallow toward the opposite end of the projection.

7 A sheet metal closure for containers, and comprising a, top and a flange provided with a reinforced lower edge, and an inwardly extending projection narrow and deep at one end portion adjacent to the reinforced edge and wide and shallow toward the other end portion. j

8. A sheet metal closure for a container having locking projections nd comprising a top and a flange, the flange having an inwardly extending projection, narrow and deep one end and wide and shallow toward the other end. the upper wall of the projection facing the top of the cap extending substantially perpendicular to the adjacent cap flange from the deep end portion tor the major part of the projection, thereby to provide a comparatively flat elongated wall for engagement with the under wall of the container projections.

9. A. sheet metal closure for a container having locking projections and comprising a top and a flange provided with a beaded lower edge and. an inwardly extending projection narrow and deep at one end and wide and shallow toward the other end with closure for a threaded the lower portion of the projection in close ;tormed projection deep at its entering end [and shallow toward its opposite end.

11. A sheet metal closure for containers and comprising a top and depending flange provided with an inwardly extending wedge-formed projection deep at its entering end and wide toward its opposite end. a

. 12. A sheet metal closure for containers and comprising a top and a shallow depending flange havingreinforcing corrugations and an inwardly extending wedgetormed projection having a deep entering end and a shallow portion toward its opposite end with the upper edge of the projection inclined in the direction of its length toward said corrugations.

13. A sheet metal closure for containers and comprising a top and a shallow depending flange having a beaded lower edge and provided with an inwardly extending wedgeformed projection having a deep entering end adjacent to such beaded edge and a shallow portion toward its opposite end with the upper edge of the projection inclined in the direction of its length.

14. A sheet metal. closure for containers and comprising a top and a depending flange provided with a plurality of inwardly.ex tending wedge formed projections, each having a narrow, deepentering end in proximity to the lower edge or the flange, a shallow portion toward its opposite end and in the direction of its length an inclined upper working face. the lower face of the projection being in close proximity to the lower edge of the flange.

15. A sheet metal. closure for containers and comprising a top and a shallow depending flange having reinforcing corrugations and a reinforcing beaded lower edge and provided with an inwardly extending wedge-formed projection having a deep entering end adjacent to the beaded edge and a shallow portion substantially filling. the space between the bead edge and the corrugations with the upper edge of the projection inclined in the direction of its length.

16. In a sheet metal cap comprising a top and a depending flange said flange having inwardly pressed wedge-formed projections therein, each having in the direction of its length an inclined upper Working wall, a lower wall and a vertical connecting Well, all of said walls tapering off and merging into the flange of the cap toward the rear end of the projection and forming a deep entering end to the projection in proximity to the lower edge. of the cap.

17. A sheet metal cap comprising a top and a depending flange having spaced reinforcements, said flange having between said reinforcements, a plurality of inwardly pressed wedge formed projections each comprising an upper inclined working wall, a lower wall and a vertical connecting wall, all of said walls tapering off and merging into the flange of the cap toward the rear end of the projection and forming a deep entering end in proximity to the lower edge of the cap.

18. The method of making a sheet metal cap having a to and a depending flange which consists in subjecting the flange to such pressure that a wedge formed projection is formed therein extending circumferentially of tllefl'ange, deep and narrow at its lower entering end and wide and shallo toward its rear end.

19'. The method of making a sheet metal shallow flange cap which consists in form-' ing a cupsliaped blank comprising a top and a shallow depending flange, then subje'cting the flange to pressure thereby to form spaced reinforcements, and therebetween a plurality of wedge-formed projections extending circumferentially of the flange, each having in the direction of its length an upper inclined wall. a lower wall and a vertical connecting wall all tapering off and merging into the flange'of the cap toward the rear end ofthe projection, the pressure being such that the projection has a deep lower entering end in proximity to the lower edge of the flange.

Signed at 1822 Park Row Building, New York city, N. Y., this 27th day of Novemher, 1922. 7

CHARLES HAMMER. 

